1
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Novel Functions of Integrins as Receptors of CD154: Their Role in Inflammation and Apoptosis. Cells 2022; 11:cells11111747. [PMID: 35681441 PMCID: PMC9179867 DOI: 10.3390/cells11111747] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/18/2022] [Accepted: 05/24/2022] [Indexed: 12/16/2022] Open
Abstract
CD154, an inflammatory mediator also known as CD40 ligand, has been identified as a novel binding partner for some members of the integrin family. The αIIbβ3, specifically expressed on platelets, was the first integrin to be described as a receptor for CD154 after CD40. Its interaction with soluble CD154 (sCD154) highly contributes to thrombus formation and stability. Identifying αIIbβ3 opened the door for investigating other integrins as partners of CD154. The αMβ2 expressed on myeloid cells was shown capable of binding CD154 and contributing as such to cell activation, adhesion, and release of proinflammatory mediators. In parallel, α5β1 communicates with sCD154, inducing pro-inflammatory responses. Additional pathogenic effects involving apoptosis-preventing functions were exhibited by the CD154–α5β1 dyad in T cells, conferring a role for such interaction in the survival of malignant cells, as well as the persistence of autoreactive T cells. More recently, CD154 receptors integrated two new integrin members, αvβ3 and α4β1, with little known as to their biological significance in this context. This article provides an overview of the novel role of integrins as receptors of CD154 and as critical players in pro-inflammatory and apoptotic responses.
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2
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Glukhova XA, Trizna JA, Melnik BS, Proussakova OV, Beletsky IP. Recruitment of TNF ligands to lipid rafts is mediated by their physical association with caveolin-1. FEBS Lett 2021; 596:211-218. [PMID: 34897688 DOI: 10.1002/1873-3468.14257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 10/29/2021] [Indexed: 11/08/2022]
Abstract
Activities of the tumour necrosis factor (TNF) family members are associated with their targeting to lipid rafts, specialised regions of the plasma membrane. Herein, we investigated the physical association of TNF and its family members cluster of differentiation 40 ligand (CD40L) and tumour necrosis factor-related apoptosis-inducing ligand with caveolin-1, a lipid raft resident protein. We discovered that the intracellular domains of TNF and CD40L interact with caveolin-1, and the membrane proximal region of TNF is required for the binding of caveolin-1 domains. Full-length TNF can form a complex with caveolin-1 in membrane rafts of HeLa cells, and caveolin-1 knockdown leads to impaired TNF transport to rafts. These findings provide the first evidence of a direct interaction between TNF, CD40L and caveolin-1 and suggest that caveolin-1 may be responsible for recruiting TNF to lipid rafts.
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Affiliation(s)
- Xenia A Glukhova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Puschino, Russia
| | - Julia A Trizna
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Puschino, Russia
| | - Bogdan S Melnik
- Institute of Protein Research, Russian Academy of Sciences, Puschino, Russia
| | - Olga V Proussakova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Puschino, Russia
| | - Igor P Beletsky
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Puschino, Russia
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3
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Kataoka S, Manandhar P, Lee J, Workman CJ, Banerjee H, Szymczak-Workman AL, Kvorjak M, Lohmueller J, Kane LP. The costimulatory activity of Tim-3 requires Akt and MAPK signaling and its recruitment to the immune synapse. Sci Signal 2021; 14:14/687/eaba0717. [PMID: 34131021 PMCID: PMC9741863 DOI: 10.1126/scisignal.aba0717] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Expression of the transmembrane protein Tim-3 is increased on dysregulated T cells undergoing chronic activation, including during chronic infection and in solid tumors. Thus, Tim-3 is generally thought of as an inhibitory protein. We and others previously reported that under some circumstances, Tim-3 exerts paradoxical costimulatory activity in T cells (and other cells), including enhancement of the phosphorylation of ribosomal S6 protein. Here, we examined the upstream signaling pathways that control Tim-3-mediated increases in phosphorylated S6 in T cells. We also defined the localization of Tim-3 relative to the T cell immune synapse and its effects on downstream signaling. Recruitment of Tim-3 to the immune synapse was mediated exclusively by the transmembrane domain, replacement of which impaired the ability of Tim-3 to costimulate T cell receptor (TCR)-dependent S6 phosphorylation. Furthermore, enforced localization of the Tim-3 cytoplasmic domain to the immune synapse in a chimeric antigen receptor still enabled T cell activation. Together, our findings are consistent with a model whereby Tim-3 enhances TCR-proximal signaling under acute conditions.
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Affiliation(s)
- Shunsuke Kataoka
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA,Asahi Kasei Pharma Corporation, Shizuoka, Japan,Graduate Program in Microbiology and Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Priyanka Manandhar
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA,Graduate Program in Microbiology and Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Judong Lee
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Creg J. Workman
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Hridesh Banerjee
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | | | - Michael Kvorjak
- Department of Surgery, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Jason Lohmueller
- Department of Surgery, Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Lawrence P. Kane
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA,Corresponding author.
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4
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Salti S, Al-Zoobi L, Darif Y, Hassan GS, Mourad W. CD154 Resistant to Cleavage from Intracellular Milieu and Cell Surface Induces More Potent CD40-Mediated Responses. THE JOURNAL OF IMMUNOLOGY 2021; 206:1793-1805. [PMID: 33762325 DOI: 10.4049/jimmunol.2001340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 02/13/2021] [Indexed: 11/19/2022]
Abstract
In addition to the membrane-bound form, CD154 also exists as a soluble molecule originating from an intracellular and membrane cleavage. We have previously shown that CD154 cleavage from T cell surface is mediated by CD40 and involves the action of ADAM10/ADAM17 enzymes. In the aim of defining the importance of CD154 maintained on cell surface, we generated a CD154 mutated at the cleavage site. Our data show that the double mutation of E112 and M113 residues of CD154 abolishes its spontaneous release and the CD40-mediated cleavage from cell surface but does not affect its binding to CD40. We also demonstrated that both the release of CD154 from the intracellular milieu and its CD40-mediated cleavage from cell surface are highly dependent on ADAM10/ADAM17 enzymes. The CD154-EM mutant was shown capable of inducing a more prominent apoptotic response in susceptible B cell lines than the wild-type (WT) form of the molecule. In addition, human B cells cultured in the presence of the CD154-EM mutant exhibited upregulated proliferative responses compared with the CD154-WT. The CD154-EM mutant was also shown to trigger differentiation of human B cells, reflected by an increased Ig production, more significantly than CD154-WT. Thus, our data strongly suggest that cleavage-resistant CD154 is a more prominent stimulant than the cleavable form of the molecule. Therefore, a maintained expression of CD154 on cell membrane and a disturbed cleavage of the molecule could be a mechanism by which CD154 is involved in some pathological conditions and should be revisited.
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Affiliation(s)
- Suzanne Salti
- Laboratoire d'Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Quebc H2X 0A9, Canada
| | - Loubna Al-Zoobi
- Laboratoire d'Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Quebc H2X 0A9, Canada
| | - Youssef Darif
- Laboratoire d'Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Quebc H2X 0A9, Canada
| | - Ghada S Hassan
- Laboratoire d'Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Quebc H2X 0A9, Canada
| | - Walid Mourad
- Laboratoire d'Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montreal, Quebc H2X 0A9, Canada
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5
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Bachsais M, Salti S, Zaoui K, Hassan GS, Aoudjit F, Mourad W. CD154 inhibits death of T cells via a Cis interaction with the α5β1 integrin. PLoS One 2020; 15:e0235753. [PMID: 32745080 PMCID: PMC7398495 DOI: 10.1371/journal.pone.0235753] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 06/22/2020] [Indexed: 12/30/2022] Open
Abstract
CD154 plays a major role in the pathogenesis of several autoimmune and inflammatory diseases. In addition to CD40, soluble CD154 (sCD154) binds to other receptors namely αIIbβ3, αMβ2, α5β1 and αvβ3 integrins. We have previously reported that binding of sCD154 to α5β1 integrin expressed on several human T cell lines is capable of inhibiting Fas-induced cell death. In the current study, we show that such effect of the sCD154/α5β1 interaction is not restricted to the cell death response induced by Fas but could also be exhibited toward other death signals such as TRAIL and TNF- α. We also demonstrate that sCD154 is capable of inhibiting Fas-mediated death of human activated T cells, more importantly of CD4+ than CD8+ T ones. Our data also show that membrane-bound CD154 and α5β1 integrin expressed on the surface of distinct cells failed to influence cell death responses. However, when membrane-bound CD154 and α5β1 are expressed on the surface of same cell, their interaction was capable of down regulating cell death. CD154 was shown to co-localize with the α5β1 integrin on the surface of these cells. These data strongly suggest a cis-type of interaction between CD154 and α5β1 when both are expressed on the same cell surface, rather than a trans-interaction which usually implicates the ligand and its receptor each expressed on the surface of a distinct cell. Taken together, these findings add to the list of roles through which CD154 is contributing to the pathogenesis of autoimmune-inflammatory diseases, i.e. by protecting T cells from death and enhancing their survival.
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Affiliation(s)
- Meriem Bachsais
- Laboratoire d’Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CR-CHUM), Montréal, Québec, Canada
| | - Suzanne Salti
- Laboratoire d’Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CR-CHUM), Montréal, Québec, Canada
| | - Kossay Zaoui
- Laboratoire d’Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CR-CHUM), Montréal, Québec, Canada
| | - Ghada S. Hassan
- Laboratoire d’Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CR-CHUM), Montréal, Québec, Canada
| | - Fawzi Aoudjit
- Centre de recherche du CHU de Québec-Université Laval, Québec, Québec, Canada
| | - Walid Mourad
- Laboratoire d’Immunologie Cellulaire et Moléculaire, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CR-CHUM), Montréal, Québec, Canada
- * E-mail:
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6
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He X, Zhang Z, Chu M. The effect of SNP rs400827589 in exon 2 of the MTNR1B gene on reproductive seasonality and litter size in sheep. Vet Med Sci 2020; 6:804-812. [PMID: 32378356 PMCID: PMC7738726 DOI: 10.1002/vms3.280] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 04/06/2020] [Accepted: 04/09/2020] [Indexed: 12/13/2022] Open
Abstract
In mammals, the melatonin receptor gene has been widely studied since it has a great influence on reproductive traits. However, little is known about the association between polymorphism of the coding region of the MTNR1B gene and year‐round oestrus or the litter size in Small Tail Han sheep. To better understand the effects of single nucleotide polymorphism (SNP) rs400827589 in MTNR1B, a population polymorphism analysis was conducted using genotyping data in 45 sheep breeds around the world. The results indicated that TT was the dominant genotype in all sheep breeds. The associations of this SNP with reproductive seasonality and litter size in Small Tail Han sheep showed rs400827589 was correlated with fecundity as assessed by reproductive seasonality and litter size (p < .05). Bioinformatics analysis indicated the change in amino acid from Ile to Leu may affect the function of the MTNR1B protein by impacting the secondary and tertiary protein structures. The present results demonstrate that rs400827589 could be used in the marker‐assisted selection of the litter size in Small Tail Han sheep.
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Affiliation(s)
- Xiaoyun He
- Key Laboratory of Animal Genetics and Breeding and Reproduction of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhuangbiao Zhang
- Key Laboratory of Animal Genetics and Breeding and Reproduction of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Mingxing Chu
- Key Laboratory of Animal Genetics and Breeding and Reproduction of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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7
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Pinigin KV, Kondrashov OV, Jiménez-Munguía I, Alexandrova VV, Batishchev OV, Galimzyanov TR, Akimov SA. Elastic deformations mediate interaction of the raft boundary with membrane inclusions leading to their effective lateral sorting. Sci Rep 2020; 10:4087. [PMID: 32139760 PMCID: PMC7058020 DOI: 10.1038/s41598-020-61110-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 02/18/2020] [Indexed: 02/06/2023] Open
Abstract
Liquid-ordered lipid domains represent a lateral inhomogeneity in cellular membranes. These domains have elastic and physicochemical properties different from those of the surrounding membrane. In particular, their thickness exceeds that of the disordered membrane. Thus, elastic deformations arise at the domain boundary in order to compensate for the thickness mismatch. In equilibrium, the deformations lead to an incomplete register of monolayer ordered domains: the elastic energy is minimal if domains in opposing monolayers lie on the top of each other, and their boundaries are laterally shifted by about 3 nm. This configuration introduces a region, composed of one ordered and one disordered monolayers, with an intermediate bilayer thickness. Besides, a jump in a local monolayer curvature takes place in this intermediate region, concentrating here most of the elastic stress. This region can participate in a lateral sorting of membrane inclusions by offering them an optimal bilayer thickness and local curvature conditions. In the present study, we consider the sorting of deformable lipid inclusions, undeformable peripheral and deeply incorporated peptide inclusions, and undeformable transmembrane inclusions of different molecular geometry. With rare exceptions, all types of inclusions have an affinity to the ordered domain boundary as compared to the bulk phases. The optimal lateral distribution of inclusions allows relaxing the elastic stress at the boundary of domains.
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Affiliation(s)
- Konstantin V Pinigin
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy prospekt, Moscow, 119071, Russia
| | - Oleg V Kondrashov
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy prospekt, Moscow, 119071, Russia
| | - Irene Jiménez-Munguía
- National University of Science and Technology "MISiS", 4 Leninskiy prospect, Moscow, 119049, Russia
| | | | - Oleg V Batishchev
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy prospekt, Moscow, 119071, Russia
| | - Timur R Galimzyanov
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy prospekt, Moscow, 119071, Russia
| | - Sergey A Akimov
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy prospekt, Moscow, 119071, Russia.
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8
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Liu J, Zhang Q, Shi Z, Yang M, Lian Z, Chen H, Feng H, Du Q, Zhang Y, Miao X, Li H, Zhou H. Increased expression of the membrane-bound CD40 ligand on peripheral CD4 + T cells in the acute phase of AQP4-IgG-seropositive neuromyelitis optica spectrum disorders. J Neuroimmunol 2018; 325:64-68. [PMID: 30408708 DOI: 10.1016/j.jneuroim.2018.10.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 10/20/2018] [Accepted: 10/30/2018] [Indexed: 02/05/2023]
Abstract
Currently, no data are available regarding the expression levels of CD40L on CD4+ T cells in patients with neuromyelitis optica spectrum disorders (NMOSD). The percentage of circulating CD40L+CD4+ T cells was measured by flow cytometry in 23 NMOSD patients and 10 healthy controls. The ratio of CD40L+CD4+ to CD4+ T cells in patients at acute phase (18.28 ± 15.56%) was significantly higher than that in healthy controls (7.23 ± 5.94%, P = .032) and was positively correlated with disease severity (r = 0.532, P = .041). Thus, our results suggest an important role of this molecule in acute attacks of NMOSD.
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Affiliation(s)
- Ju Liu
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Qin Zhang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Ziyan Shi
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Mu Yang
- Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, China
| | - Zhiyun Lian
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Hongxi Chen
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Huiru Feng
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Qin Du
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Ying Zhang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Xiaohui Miao
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Huifang Li
- Core Facility of West China Hospital of Sichuan University, Chengdu, China
| | - Hongyu Zhou
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, China.
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9
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Aarts SABM, Seijkens TTP, van Dorst KJF, Dijkstra CD, Kooij G, Lutgens E. The CD40-CD40L Dyad in Experimental Autoimmune Encephalomyelitis and Multiple Sclerosis. Front Immunol 2017; 8:1791. [PMID: 29312317 PMCID: PMC5732943 DOI: 10.3389/fimmu.2017.01791] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/29/2017] [Indexed: 12/16/2022] Open
Abstract
The CD40-CD40L dyad is an immune checkpoint regulator that promotes both innate and adaptive immune responses and has therefore an essential role in the development of inflammatory diseases, including multiple sclerosis (MS). In MS, CD40 and CD40L are expressed on immune cells present in blood and lymphoid organs, affected resident central nervous system (CNS) cells, and inflammatory cells that have infiltrated the CNS. CD40-CD40L interactions fuel the inflammatory response underlying MS, and both genetic deficiency and antibody-mediated inhibition of the CD40-CD40L dyad reduce disease severity in experimental autoimmune encephalomyelitis (EAE). Both proteins are therefore attractive therapeutic candidates to modulate aberrant inflammatory responses in MS. Here, we discuss the genetic, experimental and clinical studies on the role of CD40 and CD40L interactions in EAE and MS and we explore novel approaches to therapeutically target this dyad to combat neuroinflammatory diseases.
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Affiliation(s)
- Suzanne A. B. M. Aarts
- Department of Medical Biochemistry, Subdivision of Experimental Vascular Biology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Tom T. P. Seijkens
- Department of Medical Biochemistry, Subdivision of Experimental Vascular Biology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
- Institute for Cardiovascular Prevention (IPEK), Ludwig Maximilians University (LMU), Munich, Germany
| | | | - Christine D. Dijkstra
- Department of Molecular Cell Biology and Immunology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, Netherlands
| | - Gijs Kooij
- Department of Molecular Cell Biology and Immunology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, Netherlands
| | - Esther Lutgens
- Department of Medical Biochemistry, Subdivision of Experimental Vascular Biology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
- Institute for Cardiovascular Prevention (IPEK), Ludwig Maximilians University (LMU), Munich, Germany
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10
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Xue D, Desjardins M, Kaufman GN, Béland M, Al-Tamemi S, Ahmed E, Tao S, Friedel RH, Mourad W, Mazer BD. Semaphorin 4C: A Novel Component of B-Cell Polarization in Th2-Driven Immune Responses. Front Immunol 2016; 7:558. [PMID: 28003812 PMCID: PMC5141245 DOI: 10.3389/fimmu.2016.00558] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 11/21/2016] [Indexed: 12/27/2022] Open
Abstract
Background Semaphorins are important molecules in embryonic development and multiple semaphorins have been identified as having key roles in immune regulation. To date, there is little known about Semaphorin 4C (Sema4C) in immune biology. We report for the first time that Sema4C is inducible in human and murine B-cells and may be important for normal B-cell development. Methods Human tonsillar B-cells were studied following activation via anti-CD40 antibodies in the presence or absence of representative Th1, Th2, and regulatory cytokines. Murine B-cells from WT and Sema4C−/− mice were similarly stimulated. B-cell phenotyping in WT and Sema4C mutant mice was performed by flow cytometry and lymphoid architecture was studied by immunohistochemistry. Sema4C expression and synapse formation were analyzed by confocal microscopy. Results Gene array studies performed on human tonsillar B-cells stimulated to produce IgE revealed that Sema4C was among the top genes expressed at 24 h, and the only semaphorin to be increased under Th2 conditions. Validation studies demonstrated that human and murine B-cells expressed Sema4C under similar conditions. Sema4C−/− mice had impaired maturation of B-cell follicles in spleens and associated decreases in follicular and marginal zone B-cells as well as impaired IgG and IgA production. In keeping with a potential role in maturation of B-cells, Sema4C was expressed predominantly on CD27+ human B-cells. Within 72 h of B-cell activation, Sema4C was localized to one pole in a synapse-like structure, in association with F-actin, B-cell receptor, and Plexin-B2. Cell polarization was impaired in Sema4C−/− mice. Conclusion We have identified a novel immune semaphorin induced in human and murine B-cells under Th2 conditions. Sema4C appears to be a marker for human memory B-cells. It may be important for B-cell polarization and for the formation of normal splenic follicles.
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Affiliation(s)
- Di Xue
- Translational Research in Respiratory Diseases, The Research Institute of the McGill University Health Center , Montreal, QC , Canada
| | - Marylin Desjardins
- Translational Research in Respiratory Diseases, The Research Institute of the McGill University Health Center, Montreal, QC, Canada; McGill University Health Center, Montreal Children's Hospital, Montreal, QC, Canada
| | - Gabriel N Kaufman
- Translational Research in Respiratory Diseases, The Research Institute of the McGill University Health Center , Montreal, QC , Canada
| | - Marianne Béland
- Translational Research in Respiratory Diseases, The Research Institute of the McGill University Health Center , Montreal, QC , Canada
| | - Salem Al-Tamemi
- McGill University Health Center, Montreal Children's Hospital, Montreal, QC, Canada; Sultan Qaboos University Hospital, Muscat, Oman
| | - Eisha Ahmed
- Translational Research in Respiratory Diseases, The Research Institute of the McGill University Health Center , Montreal, QC , Canada
| | - Shao Tao
- Translational Research in Respiratory Diseases, The Research Institute of the McGill University Health Center , Montreal, QC , Canada
| | | | - Walid Mourad
- Department of Medicine, University de Montreal , Montreal, QC , Canada
| | - Bruce D Mazer
- Translational Research in Respiratory Diseases, The Research Institute of the McGill University Health Center, Montreal, QC, Canada; McGill University Health Center, Montreal Children's Hospital, Montreal, QC, Canada
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11
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Schlebach JP, Barrett PJ, Day CA, Kim JH, Kenworthy AK, Sanders CR. Topologically Diverse Human Membrane Proteins Partition to Liquid-Disordered Domains in Phase-Separated Lipid Vesicles. Biochemistry 2016; 55:985-8. [PMID: 26859249 PMCID: PMC4766968 DOI: 10.1021/acs.biochem.5b01154] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
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The integration of membrane proteins
into “lipid raft”
membrane domains influences many biochemical processes. The intrinsic
structural properties of membrane proteins are thought to mediate
their partitioning between membrane domains. However, whether membrane
topology influences the targeting of proteins to rafts remains unclear.
To address this question, we examined the domain preference of three
putative raft-associated membrane proteins with widely different topologies:
human caveolin-3, C99 (the 99 residue C-terminal domain of the amyloid
precursor protein), and peripheral myelin protein 22. We find that
each of these proteins are excluded from the ordered domains of giant
unilamellar vesicles containing coexisting liquid-ordered and liquid-disordered
phases. Thus, the intrinsic structural properties of these three topologically
distinct disease-linked proteins are insufficient to confer affinity
for synthetic raft-like domains.
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Affiliation(s)
- Jonathan P Schlebach
- Department of Biochemistry, ‡Center for Structural Biology, §Department of Molecular Physiology and Biophysics, ∥Department of Cell and Developmental Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37240, United States
| | - Paul J Barrett
- Department of Biochemistry, ‡Center for Structural Biology, §Department of Molecular Physiology and Biophysics, ∥Department of Cell and Developmental Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37240, United States
| | - Charles A Day
- Department of Biochemistry, ‡Center for Structural Biology, §Department of Molecular Physiology and Biophysics, ∥Department of Cell and Developmental Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37240, United States
| | - Ji Hun Kim
- Department of Biochemistry, ‡Center for Structural Biology, §Department of Molecular Physiology and Biophysics, ∥Department of Cell and Developmental Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37240, United States
| | - Anne K Kenworthy
- Department of Biochemistry, ‡Center for Structural Biology, §Department of Molecular Physiology and Biophysics, ∥Department of Cell and Developmental Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37240, United States
| | - Charles R Sanders
- Department of Biochemistry, ‡Center for Structural Biology, §Department of Molecular Physiology and Biophysics, ∥Department of Cell and Developmental Biology, Vanderbilt University School of Medicine , Nashville, Tennessee 37240, United States
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12
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Lorent JH, Levental I. Structural determinants of protein partitioning into ordered membrane domains and lipid rafts. Chem Phys Lipids 2015; 192:23-32. [PMID: 26241883 DOI: 10.1016/j.chemphyslip.2015.07.022] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 07/27/2015] [Accepted: 07/29/2015] [Indexed: 11/16/2022]
Abstract
Increasing evidence supports the existence of lateral nanoscopic lipid domains in plasma membranes, known as lipid rafts. These domains preferentially recruit membrane proteins and lipids to facilitate their interactions and thereby regulate transmembrane signaling and cellular homeostasis. The functionality of raft domains is intrinsically dependent on their selectivity for specific membrane components; however, while the physicochemical determinants of raft association for lipids are known, very few systematic studies have focused on the structural aspects that guide raft partitioning of proteins. In this review, we describe biophysical and thermodynamic aspects of raft-mimetic liquid ordered phases, focusing on those most relevant for protein partitioning. Further, we detail the variety of experimental models used to study protein-raft interactions. Finally, we review the existing literature on mechanisms for raft targeting, including lipid post-translational modifications, lipid binding, and transmembrane domain features. We conclude that while protein palmitoylation is a clear raft-targeting signal, few other general structural determinants for raft partitioning have been revealed, suggesting that many discoveries lie ahead in this burgeoning field.
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Affiliation(s)
- Joseph Helmuth Lorent
- Department for Integrative Biology and Pharmacology, University of Texas Health Science Center at Houston, USA
| | - Ilya Levental
- Department for Integrative Biology and Pharmacology, University of Texas Health Science Center at Houston, USA.
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A cholesterol consensus motif is required for efficient intracellular transport and raft association of a group 2 HA from influenza virus. Biochem J 2015; 465:305-14. [DOI: 10.1042/bj20141114] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The external part of the transmembrane region of HA (haemagglutinin) of influenza virus contains a cholesterol consensus motif originally identified in G-protein-coupled receptors. Various mutations in this motif retard transport of HA through the Golgi and reduce raft association.
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14
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Alturaihi H, Hassan GS, Al-Zoobi L, Salti S, Darif Y, Yacoub D, El Akoum S, Oudghiri M, Merhi Y, Mourad W. Interaction of CD154 with different receptors and its role in bidirectional signals. Eur J Immunol 2014; 45:592-602. [PMID: 25403978 DOI: 10.1002/eji.201444941] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 10/16/2014] [Accepted: 11/11/2014] [Indexed: 11/09/2022]
Abstract
In addition to its classical receptor, CD40, it is now well established that CD154 also binds αIIbβ3, α5β1, and αMβ2 integrins. Although these integrins are all members of the same family, they bind CD154 differently. The current investigation aims to analyze the interaction of CD154 with α5β1 and αMβ2 and investigate its role in bidirectional signals in various human cell lines. Results obtained herein indicate that the CD154 residues involved in the interaction with α5β1 are N151 and Q166, whereas those involved in αMβ2 binding are common to residues required for CD40, namely Y145 and R203. Soluble CD40/CD154 or αMβ2/CD154 complexes do not interfere with the binding of CD154 to α5β1-positive cells, but inhibit the binding of CD154 to CD40- or αMβ2-positive cells, respectively. Ligation of CD154 on CD154-positive cells with soluble CD40, αIIbβ3, α5β1, or αMβ2 stimulates intracellular signaling, including MAPK phosphorylation. Given that CD154 exists as a trimer, our data strongly suggest that CD154 may bind concomitantly to two receptors of the same or different family, and biologically activate cells expressing both receptors. The characterization of CD154/receptor interactions helps the identification of new therapeutic targets for the prevention and/or treatment of CD154-associated autoimmune and inflammatory diseases.
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Affiliation(s)
- Haydar Alturaihi
- Laboratoire d'immunologie cellulaire et moléculaire, Centre de Recherche-Centre Hospitalier de l'Université de Montréal (CR-CHUM), Montréal, Canada
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15
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Juhász K, Buzás K, Duda E. Importance of reverse signaling of the TNF superfamily in immune regulation. Expert Rev Clin Immunol 2014; 9:335-48. [DOI: 10.1586/eci.13.14] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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16
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Yacoub D, Benslimane N, Al-Zoobi L, Hassan G, Nadiri A, Mourad W. CD154 is released from T-cells by a disintegrin and metalloproteinase domain-containing protein 10 (ADAM10) and ADAM17 in a CD40 protein-dependent manner. J Biol Chem 2013; 288:36083-93. [PMID: 24189063 DOI: 10.1074/jbc.m113.506220] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
CD154 (CD40 ligand) is a type II transmembrane protein that belongs to the tumor necrosis factor superfamily. The soluble form of CD154 (sCD154), which results from the shedding of membrane-bound CD154, plays a key role in the production of proinflammatory cytokines and has been linked to various autoimmune and vascular disorders. Therefore, elucidating the mechanisms by which CD154 is released from the cell surface following its interaction with its various receptors is of primordial importance. Using co-culture experiments, we show that CD154 is shed predominantly upon its engagement with CD40. Indeed, only CD40 (both membrane-bound and soluble) and not α5β1 or αMβ2 is involved in the cleavage and release of CD154 from Jurkat E6.1 T-cells. Interestingly, CD154 is cleaved independently of the formation of cell surface CD40 homodimers and independently of its association into lipid rafts. In contrast, we found that the protein kinase C (PKC) signaling family and the matrix metalloproteinases ADAM10 and ADAM17 are intimately involved in this process. In conclusion, our data indicate that CD154 is released from T-cells by ADAM10 and ADAM17 upon CD40 ligation. These findings add significant insights into the mechanisms by which CD154 is down-regulated and may lead to the generation of novel therapeutic targets for the treatment of CD154-associated disorders.
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Affiliation(s)
- Daniel Yacoub
- From the Laboratoire d'Immunologie Cellulaire et Moléculaire, Centre Hospitalier de l'Université de Montréal, Hôpital St-Luc, Montréal, Quebec H2X 1P1, Canada
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Moh MC, Lorenzini PA, Gullo C, Schwarz H. Tumor necrosis factor receptor 1 associates with CD137 ligand and mediates its reverse signaling. FASEB J 2013; 27:2957-66. [PMID: 23620528 DOI: 10.1096/fj.12-225250] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Reverse signaling through CD137 ligand (CD137L) potently activates monocytes. However, the underlying mechanism is not well elucidated. This study provides evidence that tumor necrosis factor receptor 1 (TNFR1) acts as a coreceptor for CD137L and mediates CD137L signaling. CD137L colocalizes with TNFR1 on the plasma membrane and binds directly to TNFR1 via its extracellular domain. Using the human monocytic THP-1 cell line, we demonstrate that engagement of CD137L by recombinant CD137 protein promotes cell adhesion, apoptosis, expression of CD14, and production of IL-8 and tumor necrosis factor (TNF). Concomitantly, the expression of TNFR1 protein is down-regulated in response to CD137L activation, due to enhanced extracellular release and internalization of TNFR1. Activation of TNFR1 by TNF protein additively augments CD137L-induced IL-8 expression. Conversely, inhibition of TNFR1 activity by a TNFR1-neutralizing antibody inhibits CD137L-mediated cell adhesion, cell death, CD14 expression, and IL-8 production. Taken together, these data show that TNFR1 associates with CD137L and is required for CD137L reverse signaling.
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Affiliation(s)
- Mei Chung Moh
- Department of Physiology, Duke–National University of Singapore Graduate Medical School, Singapore, Singapore
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